Yes, please tell us whether the bougie is indoors or outdoors, whether it is in full sun or partial shade, whether the water drains quickly through the soil or sort of sits on top.
Only water it when the top inch or two of soil is dry, and sticking your finger down into it you can still feel that the underneath soil is just damp. Bougies like to be dry, they don't like their roots to stay wet.
If the soil looks like little rocks, it's inorganic. If it looks like dirt, it's got organic in it. Most likely it has organic, because that's what keeps the tree moist enough during transit from the nursery and the florist.
IN MY OWN OPINION (strong disclaimer) and based on helping a lot of people, be very careful about repotting the tree this soon. It has had multiple shocks, and needs time to adjust. As long as you don't overwater it, the soil is probably okay to leave it in, you just have to be very careful. Let the tree adjust to your surroundings before giving it additional changes. It was very likely raised in a greenhouse, and possibly in an entirely different part of the country.
Bougies are very tough trees, they will take a lot of punishment, so as long as the bottom layer of soil isn't soaking wet all of the time you will be fine.
Bougies also like sun, but there are people who keep them in afternoon shade to keep the very hottest sun off of their leaves. They seem to be all right with that. Don't be alarmed when the colored bracts fall off easily, as one website says, they are very fragile once they have started their reproductive cycle. (Actually, that was info from the new
Tropical Bonsai magazine, which can be viewed online, and is all about bougies this issue...
HTTP://WWW.GULFSTREAMBONSAI.ORG.)
Joanie